Rotary well drill



Nov. 1, 1927. 1,647,740

o. E. MURPHY ROTARY WELL DRILL Filedzxaarch, f Y- 'gy/jz Z7 Z6,

/z' n W/ /m VY/6 l Y lFigure 3 is a detail 'sectional view show- Patented Nov. 1,1927.

UNITED STATES PATENT oF 1,647,740 FICE.

ORVILLE E. MURPHY, OF SEMINOLE, OKLAHOMA, ASSIGNOR OF FORTY-NINE PER CENT TO AMERICAN IRON & MACHINE HOMA, A CORPORATION OF OKLAHOMA.

WORKS, INC., OF OKLAHOMA CITY, OKLA- noTARY WELL DRILL.

Application filed March 1,

This invention relates to rotary well drills and more particularly to rotary well drills employing diametrically-aligned cutting rollers and having a centrally disposed water course, such as is illustrated in the patent to H. W. Fletcher, granted February 5, 1924, No. 1,482,787.'

In the patent above mentioned is illustrated a rock bit having a recess in itsbottom within which are located a pair of diametrically opposed rollers which perform the actual drilling operation.. In the center of the bit, there is a removablewater course, by means of which iiushing water or slush -is delivered at the bottom of the bit to lremove from the vhole the matter reduced by the rollers. By the construction ordinarily employed, this flushing water is delivered directly against the rollers of the bit, with the result that it splashes outwardly against the walls of the bore andtends lto cause. the same to cave and to wear the same, so that a defective bore is produced, which must, at times, be cemented before practical operation of the well can be obtained. Accordingly, an important object of this invention is to so improve the means for delivering the water to the bottomof the well that this water is directed against the bottom of the bore and not against the rollers, so that it will be splashedv against the walls.

A further object ofthe invention is to produce -a device of this character which may be applied to bits now in use without in any manner altering the construction of the bit proper.

These and other objects 1 attainby the construction shown in the accompanying drawings, wherein for the purpose of illus` tration is shown a preferred embodiment of my invention and wherein Figure 1 is a vertical sectional view through a drill embodying a water course constructed in accordance with my invendrill ing a modified method of connecting the sections of the water course.

Referring now more particularly to the drawings7 the numeral 10 generally designates a rock bit of a well known t pe. This rock bit is diametrically divided7 to end extending 1927. serial No. 171,836.

form vtwo separable sections 11 and 12 held 55 in assembled relation by a bolt 13. The bottom faces 14 of the sections diverge downwardly and are each provided with a mounting 15 for a roller 16. Adjacent faces of the sections are provided with longitudinaly extending recesses 17 combining to produce a channel, `for the reception of av removable water course, generally designa-ted at 18. This channel is enlarged intermediate its ends, as indicated at 19, the lower end of the enlargement extending adjacent the lower end of the channel.

Between the upper faces or peripheral portions of the bit, rollers 16 and the inclined walls 14, a substantially triangular space 20 is produced andl in accordance with my invention, the lower end ofthe removable watercourse 18 is provided with a hollow T-head 21 fitting within this space and extending outwardly toward the sides of the bit. The ends 24 of the T-head are closed and one of the apices 25 of this head is upwardly extended. The base or bottom wall 26 of the T-head is provided beneath the axis of the watercourse with a triangular lug 27 forming a baille splitting the stream passing through the main portion of the water course and ldirecting the flow toward the ends of the head. Adjacent its ends, this base 26 has formed therein downwardly directed openings 28, which direct the outgoing water downwardly into the space between the rollers 16, so that it will impinge directly upon the bottom of the hole.

Any suitable means may be provided for attaching the T-head 21 to the water course. Inthe present illust-ration, 1 have disclosed in Figure 1 a water course formed in two sections 18a' and 18, one of which fits the lower portion of the channel roduced by the recesses 17 and has an en arged head fitting into the enlargement 19 of the chan-A nel and thus limiting its downward movement. The upper section 18a tits into the upper end of the channel and. has vits lower into the upper end of the secthis structur has tion 181. In Figure 3,

1been modified, the 'original water course being retained and the T-head 21 applied thereto as van attachment. To this end, the Tfhead is provided with a tubular extension 29, the upper end of which is exteriorly lli drill having. a, substantially IV'- haped notch' screw-threaded for engagement with screw threads formed uponv the interior of the main water course 18.` y f Since the construction hereinbefore set forth is capable of a certain range of change andmodiiication without materially depart# in its bottom-the walls of .which have op- :posed cutting rollers mounted thereon, 'ov

a transverselyextending conduit having closedends 'removably mounted at the apex of the V- liaped notch and having in its base downwardly directed openings for delivering flushing water downwar ly vat -o -posite sides of the rollers and means 'for dli'vering iiushing lwater to said conduit at the center thereof.

3. The combination with a rotary wellv drill having al pair ofv cutting rollers 'at its opposite ends and a water course normally delivering water to the lower end of the drill axially of the water'from the watercourse and deliecti'ng it outwardly beyondthesides of the rollers and then directing it downwardly.

4. The combination with a rotary well drill havinga substantially V-shape'd notch in its bottom the walls of which have. opposed ciittingrollers mounted thereon and a transversely having closed ends and having an apex the drill, of means receiving` enlargement of thel channel the lower end of the removable water course.'

extending triangular conduit thereof extended into` theapex ot the V-l shap'fd notch, said conduit having in its basefopenings spac conduit rom the center ythereof and means for delivering flushingwater to said conduit at the center thereof. 5. I n combination, a rotary well drill formed in two separable sections combining in assembled relation'to produce'at the bottom vof the drill aV-shaped notch 'and at the axis ofthe drilla channel said notch, opposed cutting rollers mounted upon the walls of the Veshaped notch, a conduit extending into and tting in the apex extending upwardly into @said ch'annel,`dis'. charge openingsin saidconduit at points spaced transversely of the drill and longi-v tudinally of the conduitl from the axis oi the drill and a removable watercourse in saidchannel discharging into the intake of said' conduit.

6. In combination,` a rotary. well drill ,formed in Itwo-separable sections combining in assembled relation to produce at the bot,V

tom of the'drill a V-shaped notch and at the axis of thedrill a'channel opening into said notch,\opposed cutting rollers mounted u on the walls of the V-shaped notch, a con uit into and fitting in the-apex of the extendin Vshape notch and Vhaving an intake extending `upwardly into said channel, discharge 'openings in said conduit at points,

'spacedtransversely of the drill and longied longitudinally of the opening into of the V-shaped notch and having an intake tudinally of' the conduit from the-axis ofthe drill anda removable water course in said channeldischarging into the intake of said conduit, said channel being enlarged intermediate its ends, said intake having at its4 upper end an enlargement `fitting in the In testimony whereof I vliereuntoaflix my signature.

onvnmi n MURPHY.

and receiving 

